Top Definition
A boyfriend or girlfriend or spouse that has turned bitchy and pissy on you. Usually gets dumped real quick.
"Dude, you still with that significunt other? She cockblocked me to the max at that house party!"

"Yeah man, she's been bitching at me to clean my room."
by BakonAndGrilledCheezy October 29, 2009
A Spouse that's just being a total cunt in one form or another.
"Are you married?"
"Well Kinda my Significunt other won't sign the god damn paperwork"
by lolsnax December 30, 2013
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